Comparison of HTP catalyst performance for different internal monolith structures
2019; Elsevier BV; Volume: 164; Linguagem: Inglês
10.1016/j.actaastro.2019.07.010
ISSN1879-2030
AutoresRobert-Jan Koopmans, Varun Reddy Nandyala, Sara Pavesi, Yann Batonneau, Romain Beauchet, Corentin Maleix, Martin Schwentenwein, Manfred Spitzbart, Altan Alpay Altun, Carsten Scharlemann,
Tópico(s)Catalytic Processes in Materials Science
ResumoA new technology for the manufacturing of 3D-printed ceramic catalyst support structures enables further optimisation of the catalyst, including the size and the internal geometry. An important design consideration for catalysts used in monopropellant thrusters is the size for a given design thrust level. A too small size may lead to only a partly decomposition of the incoming propellant. A too large size may lead to unnecessary heat loss to the environment and an excessive pressure drop. Both cases will result in a reduced performance. In the current investigation, four catalyst designs were subjected to a range of mass flow rates, thereby varying the average residence time in the chamber. It was found that shorter residence times lead to higher average chamber temperatures. This suggests that the catalyst is too large. Although the results for each internal design cannot be compared directly to each other, the convex tetrahedron design seems to be slightly better.
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